* {
  padding: 0;
  margin: 0;
}

header {
  width: 100%;
}
header .header {
  width: 100%;
  height: 80px;
  background: paleturquoise;
  opacity: 0.2;
  display: flex;
  justify-content: space-around;
  align-items: center;
  color: white;
}

.lunbo img {
  width: 100%;
  height: 100%;
}
